Sofa



FIG. 1 is a front perspective view of a sofa, showing my new design, andincluding a pillow thereon shown herein and throughout in broken linesby way of example only and forming no part of the claimed design;

FIG. 2 is a side view thereof;

FIG. 3 is another side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a further side view thereof;

FIG. 7 is a front view thereof;

FIG. 8 is a front view thereof with a portion in an articulatedposition;

FIG. 9 is a rear view thereof; and,

FIG. 10 is a front view thereof having the portion in anotherarticulated position.

I claim, the ornamental design for a sofa, as shown and described.